1. Aim # 27: What is an acid?
H.W. # 27
Study p. 503 pp
Ans. ques. p. 532 # 6,12-14,16
Study pp
Ans. ques. p. 109 # 24

2. e.g. CH3COOH(aq) + H2O(l) CH3COO-(aq) + H3O+(aq)
I An electrolyte will dissolve in water to form a solution that will conduct an electric current (It produces free, moving ions.) Acids, bases, and salts are electrolytes.
II Weak electrolytes in aqueous solution dissociate or ionize only partially.
e.g. CH3COOH(aq) + H2O(l) CH3COO-(aq) + H3O+(aq)
Strong electrolytes dissociate or ionize completely in water.
e.g. HCl(g) + H2O(l) → HCl(aq) → H3O+(aq) + Cl-(aq)
NaCl(s) + H2O(l) → NaCl(aq) → Na+(aq) + Cl-(aq)

3. Nonelectrolytes do not dissociate at all. e. g
Nonelectrolytes do not dissociate at all e.g. C6H12O6(s) + H2O(l) → C6H12O6(aq)
III Dissociation
NaCl(s) + H2O(l) → Na+(aq) + Cl-(aq)
(Ionic)
IV Ionization- the formation of ions from the reaction of water molecules with a molecular compound.
HCl(g) + H2O(l) → H3O+(aq) + Cl-(aq)
(covalent) hydronium ion
Hydronium ion is formed when a hydrogen ion attaches itself to a water molecule.

4. V Acid (Arrhenius’ theory) a substance that yields hydrogen ions as the only positive ions in aqueous solution. E.g. HCl(aq) + H2O(l) → HCl(aq) → H+(aq) + Cl-(aq) hydrochloric acid
H+ + H:O: → H:O:H +
H H
hydronium ion

5. V Naming Acids A. Binary Acids (do not contain oxygen)
Formula of Name of undissolved Name of water
compound compound solution
HCl hydrogen chloride hydrochloric acid
HBr hydrogen bromide hydrobromic acid
The hydrogen telluride ?
To name a binary acid, add the prefix hydro and the suffix ic
to the root of the second element in the compound. Then follow it
with the word acid.

6. Note: All other acids that do not contain oxygen are named similarly.
e.g. hydro “root”ic becomes ? hydrogen iodide becomes ? hydrogen fluoride becomes ?
Note: All other acids that do not contain oxygen are named similarly.
Name the following acid:
HCN
Ans: hydrocyanic acid

7. B. Ternary Acids- made by dissolving molecular compounds in water that form polyatomic anions.
Anion Ternary Acid
NO3-, nitrate HNO3, nitric acid
NO2-, nitrite HNO2, nitrous acid
To name a ternary acid, if the anion ends
in ate, change the ending to ic, and add the word
acid.
If the name of the anion ends in ite, change the ending
to ous, and add the word acid.
SO42- , sulfate H2SO4 ?
sulfuric acid

8. sulfurous acid SO32- sulfite H2SO3 ? ClO- HClO ClO2- HClO2 ClO3- HClO3
PO H3PO4
PO H3PO3
PO H3PO2
Ref. Table K “common acids”